Hello, Younghan!! I finally finished the last part of the Practical Java series, Advanced Part 3! I've been using lambdas, but without really understanding how they work or being aware of the concepts - I just implemented them based on what I was familiar with. After taking your lecture, I feel like my understanding of lambdas has really improved. Now I understand why we write it this way! I sometimes wonder what it would have been like if I had found this course earlier, but I think it's not too late even now. Although I'm still not completely comfortable with lambdas, I'll keep reviewing what you taught me and work on getting more familiar with them haha. Thank you always for making things so easy to understand. You worked so hard to complete the 'Practical Java Roadmap'. Thanks to you, I was able to build a solid foundation (though it was difficult), and I think I'll be able to absorb and understand new things much faster now haha. Tomorrow is Christmas, so have a great Christmas and Happy New Year🙇‍♀️ Looking forward to learning from you in '26 as well! +) You were the instructor I spent the most learning time with in '25 haha. I was so happy to be able to learn together for such a long time. It was a year where I gained a lot of knowledge I didn't have before. But since there's still so much to learn, I'll continue studying diligently in '26 as well haha